Explosive-engine.



N0. 698,285. Patnted Apr. 22, |902.

M.YN. HYLLAND.v EXPLOSIVE ENGINE.

(Applicasim ined may '18, 1901. (un model.) 3 sheets-shane.

"In III Nu. 698,285. Patented Apr. 22,1902. M. N. HYLLAND.

EXPLDSIVE ENGINE.

(Application led May 18, 1901.) l (No Model.) 3 Sheets-Sheet 3,

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v///v/////////////'/ ///////7///`l The cylinders 6,abutments '7, andbearings 8 eting chambers 9,V 10, and 11.

UNITEII STATES PATENT OFFICE.

MARTIN N. HYLLAND, OF FEDORA, SOTH DAKOTA.

EXPLOvSlVE-ENGINE.

SPECIFICATION forming'part of Letters Patent No. ees/ ,2s5, dated April22, 1902.

l A pplioation'filad May 18, 1901.1

T all 1071.071 it muy ooncerw V j Be it known that I, MARTIN N.,HYLLAND,a citizen of the United States, residing at'Fedora, in the countyofMiner and State of South Dakota, have invented certain new and usefulImprovements in Explosive-Engines; and I do hereby declare the followingto be a full, clear, and exact description of the invention', such aswill enable others skilled inthe art to which it appertains to makeanduse the same. f

My inventionrelates to explosive-engines, and has for Aits objectl toimprove the same with a View to obtaining a maximum eciency and ofreducing to a minimum the size of the fly-Wheel required.

To the above ends my invention consists of the noveldevices andcombinations of devices hereinafter described, and defined' in theclaim. y

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts throughout the several views.

Figure l is a plan view with some parts broken away, illustrating amulticylinder engine designed in accordance With my inven# tion. Fig. 2is a longitudinal vertical section taken on the line a? 'x2'of Fig. 1.Fig. 3 is a transverse vertical section taken approximately on the linem4 004 of Fig. l. Fig. 4 is a section on line 4'w4, Fig. 1;' andmFig. 5is a de-V tail in section onthe line x5 x5 of-Fig.- 3.

The numeral 1 indicates the'bed-casting, shown as having cylinder-seats2; and bearing-pedestalst3,z4, vand 5. I Four cylinders 6, located inaXially-alined pairs, each pair constituting a so-call'ed tandemcylinder, are rigidly secured in the seats 2 of the base-casting 1. Attheir outer ends cylinders iare open and the aXially-alined cylindersare rigidly secured to abutments or dividing-heads 7, formed with thepiston-rod bearings 8.

are provided, respectively, withV Water-jackvThe circulating connectionsfor'said chambers 9, 10, and ll are not shown. Working Within eachtandem cylinder, with one cylinder-head located on each side ottheabutment-7, isga tandem piston 12, the head of which is rigidlyconnected by a piston-rod 13, that Works through serial No. 60,804. onmqaeri theloearings 8. pen-ing into each explosion- 'chamber z'thusformed ywithin the cylinders adjacent to the abutments'7:is'aspring-seated int-ake-valvevjl'fl, suitably'mounted in thesleeve-like extension of thercorresponding `21, are connected 'through`branch pipes 23 with a common exhaust-pipe 24. The exhaust-valve stems22 project toward the left with respect to Figs. 1 and 2 and workloosely through a guide-plate 25, fixed on the adjacent cylinders. AlsoWithin the explosionchamber 2' of each cylinder is an insulatedelectrode 24, which cooperates with a movableelectrode 27 in the form ofa metal finger carried by the corresponding piston-head, as best shownin Fig.y 2. As shown, the several'insulated electrodes 26 are connectedby insulated metal stems 28" to "a lead-Wire 29. The otherlead-Wiremaybe connected'toany suitable portion of the-"enginefasr for instance,to the vbed-platev 1, as indicated at 30 in Fig. 2. l I

'The crank-shaft 31 of the engine issuitably journaled in thebearing-pedestals 3 and et. This shaft is provided with a pair of cranks32 and 33, the latter of Which,as shown, isinthei'orm of adisk andserves as asmall fly-Wheel. metrically opposite directions and areconnected by crank-'rods 34;, one to each of ,the tandem pistons 12, asbest shown in"Fig .`i2.

35 indicates a pinion on the crank-shaft 31, which meshes with a gear36oftw'ice its diameter carried by a shaft 37,.loo'sely journaled in thepedestal 3 and provided with fourtappets 38, oiset laterally andprojecting atl an angle of ninety degrees the one from the other. Eachtappet 3S cooperates with one of a series of four bellcrank levers 39,pivoted on a The said cranks projectin dia-A IOO shaft 4:0, supported bythe pedestals 5. A stop-rod 4l, supported by the pedestals 5, limits thedownward movements of the horizontal arms of the bell-cranks 39. Eachbellcrank 39 engages the outer end of one of the stems 22 of theexhaust-valves 23 and when acted upon by the corresponding tappet 38forces open the said corresponding exhaustvalve. Itis evident since thetappets are set ninety degrees apart and as the shaft 37 is given tworotations to one of the crankshaft 3l that the exhaust-valves will beopened with a properly-timed action for a four-cycle engine. Fig. 4shows one of the tappets as having just engaged with its coperatingbellcrank 39, and this contact, as it will be noted, takes place whilethe crank-shaft is approximately on its dead-cen ter. f By giving thetappet the proper overlap with its bell-crank 39 the exhaust-valvesactuated thereby may be held open any desired length of time.

To more clearly demonstrate the relative timed action of the engine,'thecylinders of the several engines are in Fig. l marked en` gine No. l,engine No. 2, engine No. 3, and engine No. 4. With reference to Figs. Iand 2, it will be seen that the engine No. l, having compressed itscharge, is on the point of exploding the same, while engine No. 4 isjust commencing to exhaust. Engine No. 3 is just commencing to take inits charge, while en* gine No. 2 is just commencing to compress itscharge. Bearing these relations in mind it is evident that when thecrank-shaft 3l has made a one-half rotation from the position shown inthe drawings engine No. 2 will have compressed its charge and the chargewill be exploded. When the said shaft has completed its first rotationand is back in the position indicated in the drawings, engine No. 3 willhave received, compressed, and exploded its charge. When the said shafthas made a one-and-one-half rotation, engine No. 4 will ceases havecompressed and exploded its charge. It is further evident that when thesaid crankshaft has completed its second rotation engine No. l willagain be ready to have its charge exploded.

Under the above action of the several engines the application of powerto the crankshaft is almost continuous, and a maximum resultantefficiency of the several engines is thereby obtained. Furthermore, withthe above arrangement a verysmall ily-wheel may be employed, and in manycases the ily-wheel may be dispensed with.

Vhat I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

In an explosive-engine of the four-cycle type, the combination with twotandem cy1- inders having intermediate abutments, of a pair ofcooperating tandem pistons the heads of which work in s aid cylinders onopposite sides of the cooperating abutments and the stems of which workthrough said abutments, intake-valves and exhaust-valves opening,respectively, into and from said cylinders, be tween said abutments andsaid piston-heads, a crank-shaft having cranks set one one hundred andeighty degrees in advance of the other and connected one vto each ofsaid tandem pistons, and a one-to-two valve-gear for operating said fourexhaust-valves in succession involving a series of four rotary tappetsdriven from said crank-shaft and set ninety degrees apart, whereby anexplosion is 0btained for each half-rotation of the crankshaft and foreach stroke of the pistons, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

MARTIN N. I-I YLLAND.

Witnesses:

C. L. OLEsoN, WM. STIER, Jr.

